1 package org.apache.turbine.services.intake.transform;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import java.io.BufferedReader;
58 import java.io.FileReader;
59 import org.apache.turbine.services.intake.xmlmodel.AppData;
60 import org.apache.turbine.services.intake.xmlmodel.Rule;
61 import org.apache.turbine.services.intake.xmlmodel.XmlField;
62 import org.apache.turbine.services.intake.xmlmodel.XmlGroup;
63 import org.apache.xerces.parsers.SAXParser;
64 import org.xml.sax.Attributes;
65 import org.xml.sax.InputSource;
66 import org.xml.sax.SAXParseException;
67 import org.xml.sax.helpers.DefaultHandler;
68
69 /***
70 * A Class that is used to parse an input
71 * xml schema file and creates and AppData java structure.
72 * It uses apache Xerces to do the xml parsing.
73 *
74 * @author <a href="mailto:jmcnally@collab.net>John McNally</a>
75 * @version $Id: XmlToAppData.java,v 1.3 2002/07/11 16:53:27 mpoeschl Exp $
76 */
77 public class XmlToAppData extends DefaultHandler
78 {
79 private AppData app;
80 private XmlGroup currGroup;
81 private XmlField currField;
82 private Rule currRule;
83 private String currElement;
84
85 /***
86 * Default custructor
87 */
88 public XmlToAppData()
89 {
90 app = new AppData();
91 }
92
93
94 /***
95 * Parse and xml input file and returns a newly
96 * created and populated AppData structure
97 */
98 public AppData parseFile(String xmlFile)
99 throws Exception
100 {
101 return parseFile(xmlFile, false);
102 }
103
104 /***
105 * Parse and xml input file and returns a newly
106 * created and populated AppData structure
107 */
108 public AppData parseFile(String xmlFile, boolean skipValidation)
109 throws Exception
110 {
111 SAXParser parser = new SAXParser();
112
113 // set the Resolver for the database DTD
114 DTDResolver dtdResolver = new DTDResolver();
115 parser.setEntityResolver(dtdResolver);
116
117 // We don't use an external content handler - we use this object
118 parser.setContentHandler(this);
119 parser.setErrorHandler(this);
120
121 // Validate the input file
122 parser.setFeature(
123 "http://apache.org/xml/features/validation/dynamic", true);
124 parser.setFeature("http://xml.org/sax/features/validation", true);
125
126 FileReader fr = new FileReader (xmlFile);
127 BufferedReader br = new BufferedReader (fr);
128 try
129 {
130 InputSource is = new InputSource (br);
131 parser.parse(is);
132 }
133 finally
134 {
135 br.close();
136 }
137
138 return app;
139 }
140
141
142
143 /***
144 * Handles opening elements of the xml file.
145 */
146 public void startElement(String uri, String localName,
147 String rawName, Attributes attributes)
148 {
149 currElement = rawName;
150 if (rawName.equals("input-data"))
151 {
152 app.loadFromXML(attributes);
153 }
154 else if (rawName.equals("group"))
155 {
156 currGroup = app.addGroup(attributes);
157 }
158 else if (rawName.equals("field"))
159 {
160 currField = currGroup.addField(attributes);
161 }
162 else if (rawName.equals("rule"))
163 {
164 currRule = currField.addRule(attributes);
165 }
166 }
167
168
169 /***
170 * Handles the character data, which we are using to specify the
171 * error message.
172 */
173 public void characters(char[] mesgArray, int start, int length)
174 {
175 String cdata = new String(mesgArray, start, length).trim();
176 if ( "rule".equals(currElement) && cdata.length() > 0)
177 {
178 currRule.setMessage(cdata);
179 }
180 if ( "required-message".equals(currElement) && cdata.length() > 0)
181 {
182 currField.setIfRequiredMessage(cdata);
183 }
184 }
185
186 /***
187 * Callback function for the xml parser to give warnings.
188 *
189 * @param spe a <code>SAXParseException</code> value
190 */
191 public void warning(SAXParseException spe)
192 {
193 System.out.println("Warning Line: " + spe.getLineNumber() +
194 " Row: " + spe.getColumnNumber() +
195 " Msg: " + spe.getMessage());
196 }
197
198 /***
199 * Callback function for the xml parser to give errors.
200 *
201 * @param spe a <code>SAXParseException</code> value
202 */
203 public void error(SAXParseException spe)
204 {
205 System.out.println("Error Line: " + spe.getLineNumber() +
206 " Row: " + spe.getColumnNumber() +
207 " Msg: " + spe.getMessage());
208 }
209
210 /***
211 * Callback function for the xml parser to give fatalErrors.
212 *
213 * @param spe a <code>SAXParseException</code> value
214 */
215 public void fatalError(SAXParseException spe)
216 {
217 System.out.println("Fatal Error Line: " + spe.getLineNumber() +
218 " Row: " + spe.getColumnNumber() +
219 " Msg: " + spe.getMessage());
220 }
221 }
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